______ ,all the students have covered 5 kilometers and no one quit on the half way.
________ I close the window? It's so cold here.
I bought a new dictionary and it ________ me 30 yuan.
--Must I clean the room now? --No, you __________.
It is better to teach a man to fish than ________ him fish.
.--How long have you ________there? --About four years. ~